Waterproofing material and method of making same



f ies. COMPOSITIONS,

COATING OR PLASTIC.

UNITED STATES V txamlner PATENT OFFICE.

LOUIS I. BEGELIUS, OF CLEVELAND, OHIO.

WATERPROOFING MATERIAL AND METHOD OF IAKDVG SAME.

1T0 Drawing.

Attempts have been heretofore made to waterprogf concrete by the direct applicaion 0 para wax or other equivalent waxlike substances, but for obvious reasons such methods have found but a limited field of application. There has also been developed, in the Oflice of Public Roads. a so-called oil-mixed concrete, the specifications for which will be found set forth in U. S. D. A. Bulletin No. 230. So far as I am aware, however, the direct admixture of parafiin or the like has never been successfully accomplished for the reason, among other things, that it is a very difiicult substance to comminute or to reduce into sufiiciently fine form to render its thorough admixture possible. By my present improved method, however, I have found it possible to reduce paraffin, or other similar wax-like bodies, into a very fine state of sub-division, in which state it will remain indefinitely and may be admixed in any desired proportion with cement,either just before the latter is made up into con crete or immediately following its manufacture, so as to provide a ready-mixed waterproof cement.

To the accomplishment of'the foregoing and related ends, the invention, then, consists of the ingredients and steps hereinafter fully described and particularly pointed out in the claims, the following description setting forth in detail certain ingredients and one approved mode of carrying out the invention, which, however, constitute but onewof-the various ways in which the principle of the invention may be used.

Assumin ara ax to be the selected waterproofing ma eria melt a quantity of the same, and then add there 1 1i e or ic lime. CaO groun o mes or ner, in e proportion of approximately two parts by weight of such lime to one part of the wax, thoroughly intermixing the two ingredients to make a thick batter.

Specification of Letters Patent.

PatentedJune 28, 1921.

Application fled November 14, 1918. Serial No. 262,582.

This, upon cooling, forms a solid cake which is preferably cast in a relatively thin sheet so that it may be readily broken up into pieces. action of moisture, most conveniently by simply exposing to the air, which contains sufiicient moisture to cause the lime particles to gradually slake and expand, and so subdivide and break up the wax into an infinite number of small particles which adhere to the particles of slaked lime, or at least are so intimately associated with said particles as to be indistinguishable therefrom. The

resultant fine powder may be preserved indefinitely, since it shows no particular tendency to cake, despite the fact that the paraffin remains present in unchanged form, and in quantity sufiicient so that the powder will light and burn with a dull glow.

The powder obtained as above described may then be mixed with dry cement in'desired proportion. usually several per cent. (one to three) of the parafiin content being sufficient. As already indicated, it is immaterial whether the waterproofing material be thus mixed just before the cement is wetted and made into concrete, or earlier, since the material does not deteriorate with standin I prefer a high calcium lime in making my improved material rather than a dolomitic lime, since magnesium oxid, upon being slaked, does not expand to the same extent as does calcium oxid, but a dolomitic lime can be satisfactorily used. It is also possible to use other wax-like bodies than paraffin, although the latter, by reason of its low cost and satisfactory waterproofing quality, is obviously preferable.

' and similar waxl1 z 10 are water-repellent, may Be melted, admixed with unslaked lime. and subdivided into like pulveru en orm and used successfully in waterproofing concrete. dolomitic lime is employed, a somewhat larger amount than indicated above for pure calcium oxid will be required; thus, where the composition of the lime is forty-five (45) per cent. magnesium oxid and fifty-five (55) 105 per cent. calcium oxid, approximately three (3) parts of the same to one of the parafiin wax should be used. In any case enough lime is introduced to prevent any tendency to ther forms may be employed embodying the features of my invention instead of the The latter are then exposed to the 60 Thus stgarin. c'gptain 0] an O l S Where Sack on the part of the resultant product.

one here explained, change bein made in the composition of matter, provi ed the ingredients stated by any of the following claims or the equivalent of such stated ingredients be employed, whether produced by my preferred method or by others embodying steps equivalent to those stated in the following claims.

I therefore particularly point out and distinctly claim as my invention 1- 1. A waterproo ng material for cement, which consists of a water-repellent wax-like body in finely divided form intimately associated with slaked lime.

2. A waterproofing material for cement, which consists of paraflin-wax in finely divided form intimately associated with slaked lime.

3. A composition of matter, which includes cement mixed with a small percenta e of a water-repellent wax-like body in finely divided form.

4. A composition of matter, which includes cement mixed with a small percentage of parafiin-wax in finely divided form.

5. A composition of matter, which consists of cement mixed with a small percentage of paraffin-wax in finely divided form intimately associated with slaked lime.

6. The method of making a waterproofing compound, which consists in melting a water-repellent wax-like body, admixing finely ground unslaked lime therewith, and

then slaking such lime, thereby forming a fine powder of such body in intimate association with particles of slaked lime.

7. The method of making a waterproofing compound which consists in melting parafiin-wax, admixin finely ground unslaked lime therewith, an then slaking such lime, thereby forming a fine powder of such wax in intimate association with particles of slaked lime.

8. The method of making awaterproofing compound, which consists in melting parafiin-wax admixing finely ground unslaked lime therewith in the proportion of approximately two parts to one by weight, allowing the mixture to cool, and then exposing the resultant cake to the action of moisture, whereby such lime is slaked and a fine powder formed of such wax in intimate as sociation with particles of slaked lime.

9. The method of making a waterproofing compound, which consists in melting parafiin-wax, admixing finely ground unslaked lime therewith in the proportion of approximately two parts to one by weight, allowing the mixture to cool, and then exposing the resultant cake to the action of the atmosphere, whereby such lime is slaked and a fine powder formed of such wax in intimate association with particles of slaked lime.

Signed by me, this 12th day of Novemher, 191

LOUIS M. KREGELIUS- 

